ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,513,338, issued on Dec. 30.
"Extended bit-range in HEIF" was invented by Leo Barnes (Haiar, Sweden), Davide Concion (Campbell, Calif.) and Alexandros Tourapis (Los Gatos, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Improved image coding techniques for high-bit depth images includes deriving two or more separate lower-bit-depth main and extension images from one high-bit-depth source image, and then encoding them separately as lower-bit-depth images. At a decoder, the separate main and extension images are decoded, and then combined to create a single reconstructed source image. The improved techniques may use lossless or lossy codecs, and may ...